n-butane isomerization on sulfated zirconia. Deactivation and regeneration as studied by Raman, UV-VIS diffuse reflectance and ESR spectroscopy

被引：92

作者：

Spielbauer, D ^{[1
]}

Mekhemer, GAH ^{[1
]}

Bosch, E ^{[1
]}

Knozinger, H ^{[1
]}

机构：

[1] UNIV MUNICH,INST PHYS CHEM,D-80333 MUNICH,GERMANY

来源：

CATALYSIS LETTERS | 1996年 / 36卷 / 1-2期

关键词：

zirconia-sulfated; n-butane; isomerization; deactivation; regeneration; Raman spectroscopy; UV-VIS diffuse reflectance; ESR;

D O I：

10.1007/BF00807206

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

n-butane isomerization on sulfated zirconia was studied in the temperature range 393-473 K. Rapid deactivation occurs, when the reaction is carried out in He carrier gas. In contrast, stable stationary activity was observed in H-2 carrier gas. In situ Raman and UV-VIS diffuse reflectance spectroscopy and ESR showed that the deactivation is caused by the formation of allylic and polyenylic cations and polycyclic aromatic compounds, the formation of which is largely prevented in the presence of H-2. Deactivated catalysts can be fully regenerated by treatment at 723-753 K in flowing O-2. The regeneration process was also followed by in situ spectroscopies.

引用

页码：59 / 68

页数：10

共 37 条

[1] ISOMERIZATION OF C-13 LABELED BUTANE OVER FE,MN PROMOTED SULFATED ZRO2 CATALYST [J].